The 'Twilight Saga' actor - who recently admitted he doesn't know if he has an audience outside the popular franchise - was afraid he wouldn't get the lead role in his upcoming drama, 'The Rover,' because he still gets nervous in front of casting directors.

The 27-year-old British star said: ''I'm so bad at auditioning and I was terrified that I wasn't going to get it.''

Despite his high profile and huge success, producers made Robert fight for the role in the Australian film, which tells the story of a ruthless ex-soldier who tracks down the men who stole his only valuable possession, alongside Guy Pearce.

He told 'ET Canada' at the Cannes International Film Festival: ''I really, really fought for it.''

Once he landed the role, the heartthrob relaxed.

He explained: ''It's a character that doesn't really have any constraints, it's not really specified where he's from or what his desires are, or really what his mental state is, and I felt really relaxed doing it because you could just do whatever you wanted basically.''

Robert says the movie helped boost his confidence.

He explained: ''I felt for a second that I kind of knew what I was doing a little bit. Because I just sort of fell into acting, I've never really felt like that before.''